{
  "abstract": "Stacked van der Waals magnets provide a tunable route to altermagnetism, a compensated magnetic order characterized by momentum-dependent spin splitting, and to the topological magnetic excitations that such order can host. In bilayer CrI$_3$, first-principles calculations and linear spin-wave theory reveal stacking-controlled altermagnetic order and associated magnon band topology. Combining band-representation analysis with calculations of the dynamic structure factor relevant to inelastic neutron scattering, we further characterize the chirally split topological magnons and quantify their energy corrections and lifetimes using a many-body Green's-function approach. The interlayer magnetic ground state is highly sensitive to the stacking geometry, thereby controlling the magnon band topology and transport responses. We further show that magnon--magnon interactions renormalize the magnon dispersion and dynamic structure factor, with a particular focus on magnon decay. Using van der Waals bilayer CrI$_3$ as a representative platform, our results establish stacking engineering as a structural route for tuning altermagnetism and associated topological magnon excitations, opening avenues toward stacking-controlled spintronic and magnonic devices.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.00479",
  "author_total": 3,
  "authors": [
    {
      "name": "Lu Xiao"
    },
    {
      "name": "Meng-Han Zhang"
    },
    {
      "name": "Dao-Xin Yao"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8n0fr4s3e6xmt.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.00479",
  "fulltext_url": null,
  "id": "8n0fr4s3e6xmt",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.00479",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ],
    [
      "openalex",
      "3107|Magnetic properties of thin films"
    ]
  ],
  "openalex": "W7216203198",
  "pdf_url": "https://arxiv.org/pdf/2610.00479",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/8n0fr4s3e6xmt.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:26:03Z",
      "native_id": "2610.00479",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.00479"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Stacking-Controlled Altermagnetism and Topological Magnons in Bilayer CrI$_3$",
  "title_text": "Stacking-Controlled Altermagnetism and Topological Magnons in Bilayer CrI_3",
  "type": "preprint",
  "updated_at": "2026-10-30T12:26:03Z",
  "url": "https://research.draconitic.com/paper/8n0fr4s3e6xmt",
  "venue": "arXiv",
  "versions": []
}